ABSOLUTELY, but not for conventional reasons. The marriage would be to ensure I get as much of the 90 billion as possible, then redistribute the wealth after his death. Any person who accumulates 90 billion dollars clearly has lost his sense of empathy for the poor :)

*clarification* you inheret ALL of their wealth, and it will be of your sexual orientation (strait guys and gay girls will get a woman, strait girls and gay guys will get a man).
That's all you'll know about the person though.